Improvement in files



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improvemeni n Files.

' 947 I Patented ct. NABU'.

UNITED STATES y ISAAC N. PATTEN, OF MEMPHIS, TENNESSEE.

IMPROVEMENT IN FILES.

Specication forming partof Letters Patent No. 119,947, dated October1'7, 1871.

To all whom it may concern:

Be it known that I, IsAAc N. PATTEN, of Memphis, in the State ofTennessee, have invented certain Improvements in Files, of which thefollowing is a vspecilication:

Figure l is a plan view of my invention. Fig. 2 is a transverse view,showing the narrow edge thereof.

My invention relates to an improvement in that class oi' files which isespecially adapted to sharpening saws. It consists of the file A, withteeth running to the right hand on its one side and to the left on itsopposite side, and the handles B, when constructed and arrangedsubstantially as shown and described.

A is a metallic tile, whose teeth on the one or upper face, as shown ata, incline at an angle contrariwise to those on the lower or oppositeside thereof, as shown by the dotted lines at b, which latter representthe angle or inclination of the teeth on the lower side thereof. B B aretwo handles, one upon either end of the le, which furnish a convenienthold for both hands, wherebyT the le can be moved along upon the teethof the saw its full length, thereby causing a uniformity of wear uponthe full length ofthe le between the handles and a consequent economy ofthe wear of the device. Said handles, in conjunction with the teeth orcut of the le, which latter runs or inclines to the right hand on oneside or face and to the left on the opposite side, are designed to admitof the filing of a right and left-hand tooth of a saw without re`versing the ends of the ile, as customary, but by simply turning thefile over, which is readily appreciated in practice. Hence it islconstructed of uniform dimensions its entire length, and is providedwith a tang upon either end thereof for securing thereon the handles.

In saw-files and others which are employed for a similar purpose but onehandle is provided, and hence the file is only partially worn out byuse, when it has to be thrown aside and a new one substituted; whereasthe construction of my file is such that it can be thoroughly worn outbefore a necessity exists for its being superseded by another file.

I claim- As an improved article of manufacture, a iiat ile, whose teethhave the strike and dip, as described and shown, and whose endsterminate in tangs and handles, as set forth.

In testimony of this my application for Letters Patent for animprovement in mill-saw les I hereunto sign my name.

LN. PATTEN.

Vitnesses:

JAivrEs RosE, A. R. GoonLETT. (53)

